01 - Preheat oven to 160°C and line a 12-cup muffin tin with paper liners.
02 - Place one vanilla wafer cookie at the bottom of each muffin liner.
03 - In a bowl, beat cream cheese and sugar until smooth and creamy.
04 - Add mashed banana, vanilla extract, sour cream, and egg. Mix until fully combined.
05 - Evenly divide the mixture among the muffin cups, filling almost to the top.
06 - Bake for 18–22 minutes, or until centers are set.
07 - Cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
08 - Refrigerate for at least 2 hours before serving.
09 - Top each with whipped cream, crushed wafers, and a banana slice before serving.